The raw material of the foam packaging box will be subjected to the action of water vapor when it is squeezed, so that the raw material becomes foam paper. Because the foam paper particles are easier to deform, the foam paper can be shaped into products of different shapes according to the different needs of users. The shaping process of the entire foam packaging box is the processing process of foam paper. It has obvious advantages for the processing and shaping of foam paper. On the one hand, the entire processing process does not require special processing technology, nor does it require any chemical additives, and it can achieve the advantage of recycling after use, which meets the green environmental protection requirements of foam packaging boxes. On the other hand, foam paper processing and production can meet the needs of any shape of the user, and can ensure a good cushioning effect in any shape, and play a good protective role.